AISI 8620/ GB 20CrNiMo Special Alloy Engineering Forged Steel Bar

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Forged
• Application: Structural Steel Bar, Die Steel Bar
• Surface Treatment: Black or Rough Machined
• Alloy: Alloy
• Model NO.: AISI 8620/ GB 20CrNiMo
• Special Use: Mold Steel, Cold Heading Steel
• Ut Test: Sep1921- Class C/C, D/D
• PRO: Forged Steel Bars
• Grades: Forged Steel Bar SAE 8620 8620h / Sncm220h 8620 Fo
• MOQ: 1PC
• Transport Package: Standard Seaworthy
• Specification: 200-1000mm
• Trademark: Laiwu Xincheng
• Origin: China
• HS Code: 72284000
• Production Capacity: 3000tons/Month

Product Description

AISI 8620/ GB 20CrNiMo Special Alloy Engineering Forged Steel Bar
1.About AISI 8620 Forged Alloy Steel Bars:

AISI 8620 Steel is a low alloy nickel, chromium, molybdenum case hardening steel, generally supplied in the as rolled condition with a maximum hardness HB 255max. SAE steel 8620 offers high external strength and good internal strength, making it highly wear resistant. AISI 8620 steel has a higher core strength than grades 8615 and 8617.
SAE 8620 alloy steel is flexible during hardening treatments, thus enabling improvement of case/core properties. Pre hardened and tempered (uncarburized) 8620 can be further surface hardened by nitriding but will not respond satisfactorily to flame or induction hardening due to its low carbon content.
Steel 8620 is suited for applications which require a combination of toughness and wear resistance. This grade is commonly supplied in round bar.

 

2. SAE 8620H / SAE 8620Steel Specification and Relevant Standards

Country	USA	DIN	BS	BS	Japan
Standard	ASTM A29	DIN 1654	EN 10084	BS 970	JIS G4103
Grades	8620	1.6523/	1.6523/	805M20	SNCM220
		21NiCrMo2	20NiCrMo2-2

3. SAE 8620H / SAE 8620 Steel Equivalent and chemical composition

 

Standard	Grade	C	Cr	Ni	Mo	Si	Mn	P	S
GB/T 5216	20CrNiMoH	0.17-0.23	0.35-0.65	0.35-0.75	0.15-0.25	0.17-0.37	0.6-0.95	0.035	0.035
JIS G4052	SNCM220H	0.17-0.23	0.35-0.65	0.35-0.75	0.15-0.25	0.15-0.35	0.6-0.95	0.03	0.03
ASTM A304	8620H	0.17-0.23	0.35-0.65	0.35-0.75	0.15-0.25	0.15-0.35	0.65-0.95	0.025	0.025
EN10084	20NiCrMo2	0.17-0.23	0.35-0.7	0.4-0.7	0.15-0.25	0.4	0.65-0.95	0.035	0.035

 

4.Forging of Material 8620 Steel

AISI 8620 alloy steel is forged at a start temperature of around 2250ºF (1230ºC) down to approximately 1700ºF(925ºC.) prior to the hardening heat treatment or carburizing. The alloy is air cooled after forging.

5.Forged Steel Size we can supply:

Forged Steel Round Bar	Φ85mm~1200mm
Forged Square steel Bar:	150×150-800×800mm
Forged Flat Blocks:	(150mm-800mm)*(200mm-800mm)
Forged Shaft and Forged Ring	According to Customer's drawing

5.Inspecting:
UT according toSEP1921 C/c, D/d, E/e, A388 or GB/T 6402, 
Spectral Tested, Microstructure Tested,Hardness Test,Macrostructure Test,

6.Delivery Condition:
Forged+black surface
Forged+rough machined
Forged+rough turned+QT/annealed/normalized
Surface condition: Black; Peeled; Polished; Machined; Grinded; Turned; Milled
7.Manufacture:EAF+LF+VD(Annealed,normalized,Quenched+Tempered,peeled,rough turned).
8.Heat Treatment: Normalized / Annealed / Quenched / tempered (optional)

 

Main Grade we can supply for forged steel bars

Steel series	Representative steel type
Carbon Steel series	AISI 1020,1045,A36,S355JR,S355JO
Petroleum machinery series	AISI4150,AISI4140,AISI4130,
	30CrMo,4145H
Tool mold series	1.2714,5CrMnMo,5CrNiMoV,
	1.2738,1.2311,1.2312 1.2714 H13
Bearing series	52100,GCr15,SUJ2
Marine series	4140,42CrMo,SCM440,
	709M40
Car series	SAE8620,20CrNiMo,
	SNCM220
Heavy-duty transmission series	40CrNiMo,SNCM439,
	SAE4340,EN24
Mining machinery series	655M13,826M40,
	25CrMo
Wind power gear series	18CrNiMo7-6, 17CrNiMo6, 1.6582,1.6587,SAE8620
Wind power spindle series	34CrNiMo6,817M40
Nitriding series	20MnCr5,38CrMoAl,
	31CrMoV9
Pressure vessel series	15CrMo,13CrMo4-4
Metallurgical roll series	21CrMoV511,W1.7225,
	EN19,709M40

About our factory:
Our main products include Forged Steel Round Bar from Sizes 85mm to 1100mm, Forged Steel Square Bar from Sizes 150×150 to 800×800mm with various grade ;The largest production steel ingot 15T, mainly forged alloy steel, carbon steel and other materials. The annual output of forged round can reach 60,000 tons. The products are widely used and can be supplied to users in metallurgy, chemical, hydraulic, port and marine machinery The main equipment includes a 2000-ton hydraulic press, a 3-ton electro-hydraulic hammer, a 2.5-meter ring rolling machine, and is equipped with large and small traveling machines, metalworking lathes, and multiple large and small sawing machines. The company now has more than 100 sets of production equipment from a whole set of processes from blanking, heating, forging to heat treatment and machining.